Allianz Asset Management GmbH grew its holdings in Ciena Corporation (NYSE:CIEN – Free Report) by 1.7% during the third quarter, according to the company in its most recent filing with the Securities and Exchange Commission. The firm owned 176,919 shares of the communications equipment provider’s stock after acquiring an additional 2,931 shares during the period. Allianz Asset Management GmbH owned about 0.13% of Ciena worth $25,772,000 as of its most recent SEC filing. Get Ciena alerts: Other large invest ...